reduce max size of fixture IDs to fix sqlite2 tests, because sqlite2 was...

reduce max size of fixture IDs to fix sqlite2 tests, because sqlite2 was getting negative and changing values for ID field. See http://www.sqlite.org/datatypes.htmlSigned-off-by: NYehuda Katz <wycats@gmail.com>

activerecord/lib/active_record/fixtures.rb

@@ -434,7 +434,7 @@ class FixtureClassNotFound < StandardError #:nodoc:
 # Any fixture labeled "DEFAULTS" is safely ignored.
 
 class Fixtures < (RUBY_VERSION < '1.9' ? YAML::Omap : Hash)
-  MAX_ID = 2 ** 31 - 1
+  MAX_ID = 2 ** 30 - 1
   DEFAULT_FILTER_RE = /\.ya?ml$/
 
   @@all_cached_fixtures = {}

activerecord/test/cases/fixtures_test.rb

@@ -519,8 +519,8 @@ def test_identifies_symbols
   end
 
   def test_identifies_consistently
-    assert_equal 1281023246, Fixtures.identify(:ruby)
-    assert_equal 2140105598, Fixtures.identify(:sapphire_2)
+    assert_equal 207281424, Fixtures.identify(:ruby)
+    assert_equal 1066363776, Fixtures.identify(:sapphire_2)
   end
 
   TIMESTAMP_COLUMNS = %w(created_at created_on updated_at updated_on)